Hey ,
Yes I have and can report that 4.7 Preview 1 does not work due to an engine problem preventing MaterialParameterCollections from working. Good news is that 4.7 Preview 2 has fixed and it will work perfectly. I managed to download it yesterday before it was pulled from the launcher due to a major that needs to be fixed before release. It should be up on the launcher within the next couple of days, so wait for that before upgrading if you have the in your project.
EDIT: 4.7 Preview #2 was just released! Download it from the launcher and you can use material in 4.7 